Level 2
Level 1

诱导公式


12 words 0 ignored

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SA
C(A+90)=
-SA
C(A-90)=
-CA
S(A+90)=
CA
S(A-90)=
CA
C(A±360)=
SA
S(A±360)=
-CA
C(A±180)=
-SA
S(A±180)=
-SA
S-A=
CA
C-A=
-CA
C(180-A)=
SA
S(180-A)=